Highly Efficient Biodecolorization/Degradation of Congo Red and Alizarin Yellow R by Chloroperoxidase from Caldariomyces fumago: Catalytic Mechanism and Degradation Pathway

2013 ◽  
Vol 52 (38) ◽  
pp. 13572-13579 ◽  
Author(s):  
Xuelian Li ◽  
Juan Zhang ◽  
Yucheng Jiang ◽  
Mancheng Hu ◽  
Shuni Li ◽  
...  
Keyword(s):  
Congo Red ◽  
Catalytic Mechanism ◽  
Degradation Pathway ◽  
Caldariomyces Fumago ◽  
Highly Efficient ◽  
Alizarin Yellow ◽  
Alizarin Yellow R

Ti/PbO2-Sm2O3 composite based electrode for highly efficient electrocatalytic degradation of alizarin yellow R

2019 ◽  
Vol 533 ◽  
pp. 750-761 ◽  
Author(s):  
Ying Zhang ◽  
Ping He ◽  
Lingpu Jia ◽  
Caixia Li ◽  
Huanhuan Liu ◽  
...  
Keyword(s):  
Highly Efficient ◽  
Electrocatalytic Degradation ◽  
Alizarin Yellow ◽  
Alizarin Yellow R

scholarly journals Pb-0.6%Sb/α-PbO2/β-PbO2-MnO2 Electrode Electrodeposited In Methanesulfonic Acid With Application To The Electrocatalytic Degradation of AYR Wastewater

2021 ◽  
Author(s):  
Bohao Yu ◽  
Zhenyu Zhan ◽  
Yunbo Yang ◽  
Ruidong Xu ◽  
Xuanbing Wang
Keyword(s):  
Quantitative Difference ◽  
Methanesulfonic Acid ◽  
Degradation Pathway ◽  
Composite Electrodes ◽  
Electrocatalytic Degradation ◽  
Alizarin Yellow ◽  
Alizarin Yellow R ◽  
Temperature Ranges ◽  
Application Potential ◽  
Promising Application

Abstract In the present work, a novel Pb-0.6%Sb/α-PbO2/β-PbO2-MnO2 composite electrode with high electrocatalytic activity was obtained by electrodeposition in methanesulfonic acid and further investigated in the electrochemical degradation of alizarin yellow R(AYR) wastewater. The selection of temperature ranges was found to cause a quantitative difference in the formation of α/β-PbO2 phases. In this way, both phases were simultaneously electrodeposited in the same methanesulfonic acid, and electrodes with corresponding proportions of phases were fabricated. Furthermore, performance tests indicated that composite electrodes with the most appropriate corresponding proportions of phases co-deposited with proper amount of MnO2 could obviously improve the COD removal efficiency and degradation efficiency of AYR to 78.1% and 80.3%. They also showed commendable recyclability and fine economic applicability. Ultimately, the paper proposed a proper electrocatalytic degradation pathway of AYR based on the identification of the major intermediate products. The results proved that MnO2-co-doped composite electrodes had more promising application potential in the electrocatalytic degradation of AYR wastewater.

scholarly journals Congo Red Decolorization and Detoxification by Aspergillus niger: Removal Mechanisms and Dye Degradation Pathway

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Nedra Asses ◽  
Lamia Ayed ◽  
Neila Hkiri ◽  
Moktar Hamdi
Keyword(s):  
Molecular Structure ◽  
Aspergillus Niger ◽  
Azo Dyes ◽  
Lignin Peroxidase ◽  
Congo Red ◽  
Manganese Peroxidase ◽  
Dye Degradation ◽  
Degradation Pathway ◽  
Effects Of Ph ◽  
Maximum Decolorization

Congo red is one of the best known and used azo dyes which has two azo bonds (-N=N-) chromophore in its molecular structure. Its structural stability makes it highly toxic and resistant to biodegradation. The objective of this study was to assess the congo red biodegradation and detoxification by Aspergillus niger. The effects of pH, initial dye concentration, temperature, and shaking speed on the decolorization rate and enzymes production were studied. The maximum decolorization was correlated with lignin peroxidase and manganese peroxidase production. Above 97% were obtained when 2 g mycelia were incubated at pH 5, in presence of 200 mg/L of dye during 6 days at 28°C and under 120 to 150 rpm shaking speed. The degraded metabolites were characterized by using LC-MS/MS analyses and the biodegradation mechanism was also studied. Congo red bioconversion formed degradation metabolites mainly by peroxidases activities, i.e., the sodium naphthalene sulfonate (m/z = 227) and the cycloheptadienylium (m/z = 91). Phytotoxicity and microtoxicity tests confirmed that degradation metabolites were less toxic than original dye.

Construction of Highly Efficient Fe3O4@AlOOH Lamellar Adsorbent for Removal of Congo Red

2018 ◽  
Vol 18 (1) ◽  
pp. 407-413 ◽  
Author(s):  
Yuanna Zhu ◽  
Jianrong Wang ◽  
Yingzi Wang ◽  
Xueling Song ◽  
Yanan Xu ◽  
...  
Keyword(s):  
Congo Red ◽  
Highly Efficient

scholarly journals Novel and Reusable Mesoporous Silica Supported 4-Methylbenzenesul- fonate-functionalized Ionic Liquids for Room Temperature Highly Efficient Preparation of 2,4,5-Triaryl-1H-imidazoles

2021 ◽  
Vol 65 (4) ◽  
Author(s):  
Yang Liu ◽  
Qi Rong ◽  
Chen Chen ◽  
Hu Yu Lin
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Catalytic Mechanism ◽  
Catalyst Stability ◽  
Catalyst Amount ◽  
Supported Ionic Liquid ◽  
Highly Efficient ◽  
Excellent Activity ◽  
Commercial Applications ◽  
Supported Ionic Liquids

Abstract. A series of mesoporous materials supported ionic liquids were prepared and tested as effective and practical catalysts for the synthesis of 2,4,5-triaryl-1H-imidazoles. The effects of type of catalysts, catalyst amount, and catalyst stability have also been investigated in detail, the catalyst Ti-SBA-15@ILTsO exhibited excellent activity in excellent yields of 92 % ~ 99 % with low catalyst amount at room temperature within 1 h. In addition, the supported ionic liquid can be easily recovered and reused for six times with satisfactory catalytic activity. Furthermore, a general synergetic catalytic mechanism for the reaction was proposed. Maybe this work employing Ti-SBA-15@ILTsO as highly efficient and stable catalyst for the synthesis of 2,4,5-triaryl-1H-imidazoles has potential commercial applications.   Resumen. Se prepararon y probaron una serie de materiales mesoporosos soportados con líquidos iónicos como catalizadores eficaces y prácticos para la síntesis de 2,4,5-triaryl-1H-imidazoles. También se investigaron en detalle los efectos del tipo de catalizadores, la cantidad de catalizador y la estabilidad del catalizador. El catalizador Ti-SBA-15@ILTsO mostró una excelente actividad con rendimientos excelentes del 92 % ~ 99% con una baja cantidad de catalizador a temperatura ambiente en 1 h. Además, el líquido iónico soportado puede recuperarse fácilmente y reutilizarse durante seis veces con una actividad catalítica satisfactoria. Por otro lado, se propuso un mecanismo catalítico sinérgico general para la reacción. Este trabajo que emplea Ti-SBA-15@ILTsO como catalizador altamente eficiente y estable para la síntesis de 2,4,5-triaril-1H-imidazoles puede tener aplicaciones potencialmente comerciales.

scholarly journals Hierarchically porous SiO2/C hollow microspheres: a highly efficient adsorbent for Congo Red removal

RSC Advances ◽  
2018 ◽  
Vol 8 (35) ◽  
pp. 19852-19860 ◽  
Author(s):  
Jie Wang ◽  
Longya Xiao ◽  
Shuai Wen ◽  
Nuo Chen ◽  
Zhiyin Dai ◽  
...  
Keyword(s):  
Porous Structure ◽  
Surface Area ◽  
Congo Red ◽  
Hollow Microspheres ◽  
Hierarchically Porous ◽  
Hierarchically Porous Structure ◽  
Highly Efficient ◽  
Porous Sio2 ◽  
Adsorption Amount ◽  
Efficient Adsorbent

Hierarchically porous SiO2/C hollow microspheres (HPSCHMs) were synthesized. Its surface area is up to 1154 m2g–1. Hierarchically porous structure facilitates diffusion of adsorbate. Its maximum adsorption amount for Congo Red is up to 2512 mg g–1.

scholarly journals Multi-walled carbon nanotubes modified by polyaniline for the removal of alizarin yellow R from aqueous solutions

2017 ◽  
Vol 36 (1-2) ◽  
pp. 198-214 ◽  
Author(s):  
Kaiyue Wu ◽  
Jingang Yu ◽  
Xinyu Jiang
Keyword(s):  
Carbon Nanotubes ◽  
Adsorption Capacity ◽  
In Situ Polymerization ◽  
Maximum Adsorption Capacity ◽  
Gravimetric Analysis ◽  
Removal Capacity ◽  
Alizarin Yellow ◽  
Alizarin Yellow R ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Multi-walled carbon nanotubes (MWCNTs) encapsulated by polyaniline (PANI) were synthesized by in situ polymerization. Scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy and thermal gravimetric analysis (TGA) were used to characterize the synthesized composites (O-MWCNTs/PANI), and the surface area was calculated by the Brunauer–Emmett–Teller (BET) method. The removal capacity of alizarin yellow R (AYR) with O-MWCNTs/PANI was further investigated. Experiments were conducted to optimize the adsorption conditions, including contact time, pH, initial concentration of AYR and temperature. The results showed that the maximum adsorption capacity for AYR was 884.80 mg/g. The adsorption kinetics and the adsorption isotherm could be better described by the pseudo-second-order model and the Langmuir isotherm, respectively. Energy changes revealed that the adsorption process was exothermic and spontaneous in nature. Additionally, the O-MWCNTs/PANI showed higher adsorption capacity than pristine MWCNTs or PANI. Therefore, O-MWCNTs/PANI would be applied as an efficient adsorbent for the removal of dye from water.

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